Siemens SIPROTEC

Technical Data
4.9 Earth Fault Protection in Earthed Systems (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
600
Inverse Current Stage (ANSI)
Inverse Current Stage (logarithmic inverse)
Pickup value 3I
0P
for I
N
= 1 A 0.05 A to 25.00 A
or
0.003 A to 25.000 A
Increments 0.01 A
Increments 0.001 A
for I
N
= 5 A 0.25 A to 125.00 A
or
0.015 A to 125.000 A
Increments 0.01 A
Increments 0.001 A
Time factor D
3I0P
0.50 s to 15.00 s
or ∞ (ineffective)
Increments 0.01 s
Additional time delay T
3I0P add
0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Characteristics See Figure 4-3 and 4-4
Tolerances
Pickup and dropout thresholds 3I
0p
3 % of set value, or 1 % nominal current
Pickup time for 2 ≤ I/3I
0P
≤ 20 and D
3I0P
≥ 1 s 5 % of set value ± 15 ms
Defined times 1 % of set value or 10 ms
Pickup value 3I
0P
for I
N
= 1 A 0.05 A to 25.00 A
or
0.003 A to 25.000 A
Increments 0.01 A
Increments 0.001 A
for I
N
= 5 A 0.25 A to 125.00 A
or
0.015 A to 125.000 A
Increments 0.01 A
Increments 0.001 A
Start current factor 3I
0P FACTOR
1.0 to 4.0 Increments 0.1
Time factor T
3I0P
0.05 s to 15.00 s; ∞ Increments 0.01 s
Maximum time T
3I0P max
0.00 s to 30.00 s Increments 0.01 s
Minimum time T
3I0P min
0.00 s to 30.00 s Increments 0.01 s
Additional time delay T
3I0P add
0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Characteristics See Figure 4-5
Tolerances
Pickup and dropout thresholds 3I
0p
3 % of set value, or 1 % nominal current
Pickup time for 2 ≤ I/3I
0P
≤ 20 and T
3I0P
≥ 1 s 5 % of set value ± 15 ms
Defined times 1 % of setting value or 10 ms